Periodic blowdown flash tank

Abstract

The utility model provides a periodic blowdown flash tank, which relates to the technical field of steam boilers, and comprises a barrel body, the inner part of the barrel body is hollow, an accommodating cavity is formed, the bottom of the barrel body is provided with a blowdown port communicated with the accommodating cavity, and the side wall of the barrel body is provided with a drainage inlet communicated with the accommodating cavity; an emptying opening communicated with the accommodating cavity is formed in the top of the cylinder body; the corrugated plate dehydration structure is arranged in the containing cavity and located between the drainage inlet and the emptying opening, the corrugated plate dehydration structure comprises at least one corrugated plate, an included angle is formed between the corrugated plate and the vertical direction, the corrugated plate is connected with the inner wall of the barrel in a sealed mode, and a plurality of through holes are formed in the corrugated plate. The periodic blowdown flash tank provided by the utility model can effectively reduce the water content of exhaust gas at the emptying port of the periodic blowdown flash tank, so as to achieve an environment-friendly effect.

Description

Technical Field

[0001] The utility model relates to the technical field of steam boilers, in particular to a periodic sewage expansion container for steam boilers. Background Art

[0002] The periodic blowdown expansion tank is an important equipment in the steam boiler system, referred to as "regular blowdown". The low points of the steam boiler system, such as the drum, header, continuous blowdown expansion tank, deaerator, etc., which are easy to accumulate dirt, need to discharge dirt to the outside of the system according to a certain rule. This discharge is in the form of drainage, and the dirt is taken away by drainage to achieve sewage discharge. The periodic blowdown expansion tank is a device that receives these drainages and treats them uniformly.

[0003] The nature and capacity of the pollutants contained in the sewage discharged from the steam drum, header, continuous blowdown expansion tank, deaerator and other equipment are different. The pressure, temperature and flow rate of these wastewaters are also different, and the time of entering the periodic blowdown expansion tank is also uncertain. Therefore, it can be seen that the water coming from the periodic blowdown expansion tank is intermittent, the pressure, temperature and flow rate of the water fluctuate greatly, and the quality and quantity of the pollutants contained in the water fluctuate greatly. This is one of the characteristics of the periodic blowdown expansion tank.

[0004] The periodic sewage expansion tank is a container directly connected to the atmosphere. After the incoming water enters the periodic sewage expansion tank, flash evaporation will occur due to the release of pressure energy and kinetic energy and the conversion of thermal energy. Part of the water will be converted from liquid to gas. The converted steam will be mainly discharged to the atmosphere through the exhaust port, and the rest of the water will become undersaturated water after releasing part of the enthalpy. The undersaturated water will be mainly discharged through the wastewater outlet. This is the second characteristic of the periodic sewage expansion tank.

[0005] During the intense drainage and subsequent flash evaporation and discharge process, part of the liquid water is carried by the steam and discharged from the drain port of the periodic sewage expansion tank. After the steam is discharged into the atmosphere, because the ambient temperature is much lower than the steam temperature, the steam releases heat and condenses into liquid water droplets, which appear white in the air. When part of the liquid water is carried by the steam and discharged from the drain port, because the density of liquid water is nearly a thousand times that of steam, the amount of liquid water is in most cases much greater than the amount of steam condensation, and the white volume formed by liquid water is much larger than the white volume formed by steam condensation. This phenomenon is called "white pollution."

[0006] In recent years, there have been many efforts to reduce and eliminate "white pollution", but the effect is not great. Some methods are to use water spraying measures under the emptying port, and some methods are to install a heat exchanger in the cylinder. The above methods mainly seek solutions from the perspective of heat exchange, but they are not effective because the residence time of sewage and water vapor in the fixed discharge is too short.

[0007] In view of this, the inventor has designed a periodic sewage expansion container based on many years of production design experience in this field and related fields and through repeated experiments, in order to solve the problems existing in the prior art. Utility Model Content

[0008] The utility model aims to provide a periodic sewage expansion container, which can effectively reduce the exhaust water content of the exhaust port of the periodic sewage expansion container and achieve environmental protection effect.

[0009] In order to achieve the above-mentioned object, the utility model proposes a periodic sewage discharge expansion container, wherein the periodic sewage discharge expansion container comprises:

[0010] The cylinder is hollow inside and forms a receiving cavity, the bottom of the cylinder is provided with a sewage outlet connected to the receiving cavity, the side wall of the cylinder is provided with a drainage inlet connected to the receiving cavity, and the top of the cylinder is provided with an emptying port connected to the receiving cavity;

[0011] The corrugated plate dehydration structure is arranged in the accommodating cavity and is located between the drainage inlet and the emptying port. The corrugated plate dehydration structure includes at least one corrugated plate, the corrugated plate has an angle with the vertical direction, the corrugated plate is sealed and connected to the inner wall of the cylinder, and a plurality of through holes are opened on the corrugated plate.

[0012] As described above, in the periodic sewage expansion container, the corrugated plate dehydration structure comprises a plurality of the corrugated plates, and the plurality of the corrugated plates are arranged in parallel and at intervals.

[0013] As described above, in the periodic sewage discharge expansion container, the corrugation extension directions of two adjacent corrugated plates are staggered.

[0014] As described above, in the periodic sewage discharge expansion container, the corrugated plate is arranged horizontally, has a plurality of wave crests protruding upwards, and has a wave valley protruding downwards between two adjacent wave crests.

[0015] The periodic sewage discharge expansion container as described above, wherein the wave crest and the wave trough are respectively in an arc shape.

[0016] The periodic sewage discharge expansion container as described above, wherein the wave crest and the wave trough are respectively in a bent shape.

[0017] As described above, in the periodic sewage expansion container, a plurality of drainage holes penetrating vertically are opened at the trough position, and the plurality of drainage holes are arranged at intervals.

[0018] The periodic sewage discharge expansion container as described above, wherein the inner diameter of the drainage hole is larger than the inner diameter of the through hole.

[0019] As described above, in the periodic sewage discharge expansion container, the inner wall of the cylinder is fixedly connected with a support frame, and the corrugated plate is connected to the inner wall of the cylinder through the support frame.

[0020] The periodic sewage discharge expansion container as described above, wherein the periodic sewage discharge expansion container further includes a sewage pipe, the sewage pipe is connected to the sewage outlet, and a valve and a water seal structure are provided on the sewage pipe.

[0021] Compared with the prior art, the utility model has the following characteristics and advantages:

[0022] The utility model proposes a periodic sewage expansion container, and a corrugated plate dehydration structure is arranged at the front end of the emptying port. The corrugated plate dehydration structure uses a corrugated plate with multiple through holes to dehydrate the steam flow. Compared with a flat plate, the corrugated plate has a larger surface area, so that the liquid droplets adhere to the surface of the corrugated plate to form large liquid droplets, and the surface tension of water and the gravity of large water droplets are used to overcome the drag of the exhaust steam, thereby reducing the emptying of liquid water. At the same time, when the steam flow collides with the corrugated plate, the steam flow needs to flow out from each through hole, thereby changing the flow direction. At this time, the liquid water droplets can be thrown out by inertia. After that, the steam flow passes through each through hole again, and the water droplets are further filtered out by changing the flow rate, thereby finally ensuring that the amount of water carried by the steam flow is reduced.

[0023] The periodic sewage expansion container proposed by the utility model can realize the expansion flash evaporation and safe discharge of boiler sewage. At the same time, due to the measure of arranging a porous corrugated plate in the cylinder body, the droplets in the exhaust steam are separated, and the exhaust steam at the discharge port contains very little water, thereby achieving an environmental protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0025] Figure 1 This is a schematic diagram of the structure of the periodic expander proposed by the utility model;

[0026] Figure 2 It is a top view of the corrugated plate in the utility model;

[0027] Figure 3 It is a side view of the corrugated plate in the utility model;

[0028] Figure 4 It is a schematic diagram of the installation of the corrugated plate in the utility model.

[0029] Description of Reference Numerals

[0030] 100. Regular sewage expansion container; 10. Cylinder;

[0031] 11. Accommodating chamber; 12. Sewage outlet;

[0032] 13. Drainage inlet; 14. Drainage outlet;

[0033] 20. Corrugated plate dehydration structure; 21. Corrugated plate;

[0034] 22. Through hole; 23. Wave crest;

[0035] 24. Trough; 25. Drainage hole;

[0036] 26. Support frame; 27. Sealing plate;

[0037] 30. Sewage pipe; 31. Valve;

[0038] 32. Water seal structure. DETAILED DESCRIPTION

[0039] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be considered to belong to the scope of the present invention.

[0040] like Figures 1 to 4 As shown, the utility model proposes a periodic sewage expansion container 100, which includes a cylinder 10 and a corrugated plate dehydration structure 20. The cylinder 10 is hollow inside and forms a accommodating chamber 11. A sewage outlet 12 connected to the accommodating chamber 11 is provided at the bottom of the cylinder 10, a drainage inlet 13 connected to the accommodating chamber 11 is provided on the side wall of the cylinder 10, and an emptying port 14 connected to the accommodating chamber 11 is provided on the top of the cylinder 10; the corrugated plate dehydration structure 20 is arranged in the accommodating chamber 11 and is located between the drainage inlet 13 and the emptying port 14. The corrugated plate dehydration structure 20 includes at least one corrugated plate 21, which has an angle with the vertical direction, is sealed and connected to the inner wall of the cylinder 10, and has a plurality of through holes 22.

[0041] The periodic sewage expansion container 100 proposed by the utility model is provided with a corrugated plate dehydration structure 20 at the front end of the emptying port 14. The corrugated plate dehydration structure 20 uses a corrugated plate 21 with multiple through holes 22 to dehydrate the steam flow. Compared with a flat plate, the corrugated plate 21 has a larger surface area, so that the droplets adhere to the surface of the corrugated plate 21 to form large droplets, and the surface tension of water and the gravity of large water droplets are used to overcome the drag of the exhaust steam, thereby reducing the emptying of liquid water. At the same time, when the steam flow collides with the corrugated plate 21, the steam flow needs to flow out from each through hole 22, thereby changing the flow direction. At this time, the liquid water droplets can be thrown out by inertia. After that, the steam flow passes through each through hole 22 again, and the water droplets are further filtered out by changing the flow rate, thereby finally ensuring that the amount of water carried by the steam flow is reduced.

[0042] The periodic sewage expansion container 100 proposed in the utility model can realize the expansion flash evaporation and safe discharge of boiler sewage. At the same time, due to the measure of arranging a porous corrugated plate in the cylinder 10, the droplets in the exhaust steam are separated, and the exhaust steam at the exhaust port contains very little water, thereby achieving an environmental protection effect.

[0043] In an optional embodiment of the present invention, the corrugated plate dehydration structure 20 includes a plurality of corrugated plates 21, and the plurality of corrugated plates 21 are arranged in parallel and spaced apart. The airflow passes through the plurality of corrugated plates 21 repeatedly to drain water, further reducing the emptying of liquid water.

[0044] In an optional example of this embodiment, the corrugation extension directions of two adjacent corrugated plates 21 are staggered, which can further normalize the airflow path, increase the contact area, and reduce the drainage of liquid water.

[0045] In an optional embodiment of the present invention, the corrugated plate 21 is arranged horizontally, and has a plurality of upwardly protruding crests 23 on the corrugated plate 21, and a downwardly protruding trough 24 is provided between two adjacent crests 23. With the above structure, the corrugated plate 21 is perpendicular to the steam flow direction, further increasing the path of the steam flow and the contact area between the steam flow and the corrugated plate 21.

[0046] In an optional example of this embodiment, the wave crest 23 and the wave trough 24 are respectively in an arc shape.

[0047] In another optional example of this embodiment, the wave crest 23 and the wave trough 24 are respectively in a bent shape.

[0048] In an optional example of this embodiment, a plurality of drainage holes 25 extending vertically are provided at the trough 24, and the plurality of drainage holes 25 are arranged at intervals. With the above structure, when exhausting steam, condensed water droplets will fall into the water accumulation area at the bottom of the cylinder 10 along the drainage holes 25, and then be discharged from the sewage outlet 12.

[0049] In this embodiment, the power for the upward movement of the airflow and the downward movement of the water droplets comes from the pressure of the sewage, and does not consume any electricity or other media.

[0050] In an optional example, the inner diameter of the drainage hole 25 is larger than the inner diameter of the through hole 22 to facilitate the drainage of condensed water droplets.

[0051] In an optional embodiment of the present invention, a support frame 26 is fixedly connected to the inner wall of the cylinder 10 , and the corrugated plate 21 is connected to the inner wall of the cylinder 10 via the support frame 26 .

[0052] In an optional example of the present invention, the cross section of the cylinder 10 is circular, the corrugated plate 21 is a circular plate, and the outer edge of the corrugated plate 21 is sealed and connected to the inner wall of the cylinder 10 .

[0053] In another optional example of the present invention, the cross-section of the cylinder 10 is circular, the corrugated plate 21 is a square plate, and a sealing plate 27 is horizontally arranged between the corrugated plate 21 and the inner wall of the cylinder 10 to close the gap between the inner wall of the cylinder 10 and the corrugated plate 21.

[0054] In an optional example of the present invention, the corrugated plate 21 and the support frame 26 are both made of stainless steel.

[0055] In an optional embodiment of the present invention, the periodic sewage expansion container 100 further includes a sewage pipe 30 , which is connected to the sewage outlet 12 , and a valve 31 and a water seal structure 32 are provided on the sewage pipe 30 .

[0056] The detailed explanation of the above-mentioned embodiments is only intended to explain the present invention so as to facilitate a better understanding of the present invention. However, these descriptions cannot be interpreted as limitations on the present invention for any reason. In particular, the various features described in different embodiments may also be arbitrarily combined with each other to form other embodiments. Unless there is a clear description to the contrary, these features should be understood to be applicable to any embodiment and are not limited to the described embodiments.

Claims

1. A periodic sewage expansion container, characterized in that: The periodic sewage expansion container comprises: The cylinder is hollow inside and forms a receiving cavity, the bottom of the cylinder is provided with a sewage outlet connected to the receiving cavity, the side wall of the cylinder is provided with a drainage inlet connected to the receiving cavity, and the top of the cylinder is provided with an emptying port connected to the receiving cavity; The corrugated plate dehydration structure is arranged in the accommodating cavity and is located between the drainage inlet and the emptying port. The corrugated plate dehydration structure includes at least one corrugated plate, the corrugated plate has an angle with the vertical direction, the corrugated plate is sealed and connected to the inner wall of the cylinder, and a plurality of through holes are opened on the corrugated plate.

2. The periodic sewage expansion container according to claim 1, characterized in that: The corrugated plate dehydration structure comprises a plurality of corrugated plates, and the plurality of corrugated plates are arranged in parallel and at intervals.

3. The periodic sewage expansion container according to claim 2, characterized in that: The corrugations of two adjacent corrugated plates extend in directions that are staggered.

4. The periodic sewage expansion container according to claim 1, characterized in that: The corrugated plate is arranged horizontally, and has a plurality of wave crests protruding upward, and a wave valley protruding downward is provided between two adjacent wave crests.

5. The periodic sewage expansion container according to claim 4, characterized in that: The wave crest and the wave trough are respectively in arc shape.

6. The periodic sewage expansion container according to claim 4, characterized in that: The wave crests and the wave troughs are respectively in a bent shape.

7. The periodic sewage expansion container according to claim 4, characterized in that: A plurality of drainage holes extending vertically are provided at the wave trough positions, and the plurality of drainage holes are arranged at intervals.

8. The periodic sewage expansion container according to claim 7, characterized in that: The inner diameter of the drainage hole is larger than the inner diameter of the through hole.

9. The periodic sewage expansion container according to claim 1, characterized in that: The inner wall of the cylinder is fixedly connected with a support frame, and the corrugated plate is connected to the inner wall of the cylinder through the support frame.

10. The periodic sewage expansion container according to claim 1, characterized in that: The periodic sewage expansion container also includes a sewage pipe, which is connected to the sewage outlet and is provided with a valve and a water seal structure.

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